Water-cooled welding-electrode for electric spot-welding machines.



A. G. TAYLOR. WATER COOLED WELDING ELECTRODE FOR ELECTRIGSPOT WELDING MACHINES.

APPLICATION FILED NOV.1, 1912.

Patented Apr. 8, 1913.

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and removable welding end.

V UNITED STATES PATENT OFFICE.

ALBEBTIS C. TAYLOR, OF WARREN, OHIO, ASSIGNOR TO THE WINFIELD MANUFAC-v TUBING COMPANY, OF WARREN, OHIO, A CORPORATION.

WATER-COOLED WELDING-ELECTRODE FOR -ELECPJI'BIC SPOT-WELDING MACHINES,

Specification of Letters Patent. Application filed November 1, 1912. Serial No. 729,011.

1 1 To all whom z'tmay concern:

Be it known that I, ALBERTIS 0. Terror, a citizen of the United States, residing at Warren, in the. county of Trumbull and 5 State of Ohio, have invented certain new" and useful Emprovements in Water-Cooled Welding-Electrodes for Electric Spot-Welding'Machines, of which the following is a specification.

My invention relatesto improvements in l as herein shown and described and more particularly pointed out in the claims.

In electric spot-welding machines wherein solid welding electrodes or so-called welding ppints of copper are used to conduct the electric current and make the weld, the

means for holding the electrodes usually comprise clamping devices and also suitable supports to bring the electrodes intzi pressure engagementwith'the work. In some 2 instances the said supports have been ,pro-

vided with water-circulating passagesadj acent to the electrodes to keep them measurably cool.

The object of the present invention is to 3 provide a sectional electrode of simple and practical construction wherein the parts are artieularly related-and arranged to circuliite a cooling medium internally through the length of the electrode and its separate In the accompanying drawingsfFi gure 1 is a vertical section through the electrode in its entirety. Fig. 2 is 9, perspective view of the tubular body of the electrode. Fig.- 8 is a cross section of the electrode on line ,ww, Fig. 1. Fig. 4 is a perspective view of the flat-sided bolt which extends centrally through the tubular body of the electrode, and Fig. 5 is a perspective view of the actual welding member comprising the removable pointor tip of the electrode. Fig. 6 is a sectional view illustrating a modification of the invention- The improvement comprises a round tubular body 2 of cop r,'or other material of good electrical con activity, and a separate removable point or tip member 3 which is provided with acentral-bore 4' extending nearly to its-tapered welding extremity 5.

tapered or otherwise formed to fit within a flaring, seat or socket 7 within the lower end Patented Apr. 8,1913. I

of said body 2, and the means for securing the separate member 3 as an extension to body 2 consists of a steel or iron bolt 8 havlng a lower screw-threaded end 9 adapted to" engage with the threaded part of bore 4. The upper end of bolt 8 is also threaded and projects above the top of body 2 where it is engaged by a cap nut 10, which is seated upon a washer 11 of rawhide or other yielding and expansible material to make a fluid- A tight joint and to allow for unequal expansion between the copper parts of the electrode and the steel bolt 8. Bolt 8 is of the same diameter as the bore of body 2 and fits snugly therein, but is cut away or reduced at opposite sides thereof between its threaded ends to provide se arate passages 12 and 14 within the body 2- or free circulation of water lengthwise of the electrode,

the water entering through 01 18 of the two top branch tubes 15 and discharging through the other after passing into andout of the bore 4 of the removable member 3 by way of the twoopenings or channels 16 in the. bottom end of bolt' 8.

The water connections with branch tubes 15 may be by flexible hose or any other suitable means, and are intended to be detachable; and the electrode or welding point in its entirety is also designed to be a" removable part'of the holder of the welding machine.

Bolt 8 is a stud-bolt shown as having a lateral projection or lu 17 at its upper end, see Fig. 4, which is a apted to seat within the groove 18 in the top of tubular. body'2, see Fig. 2, when the parts,are assembled, thereby fixing the. bolt within the said body so that the separate passages 12 and 14 always coincide with the intake and outlet tubes 15'. The bolt ,is also thereby locked against independent rotation when either the welding end member 3 is rotated for adjustment or setting, or the cap nut '10 is screwed in place to tighten and fix the parts together. However, groove 18 is long enough to permit an end movement of the lug there- 'in infastening the bolt and the other parts together. A rigid and stable fastening isrequired in view of the pressureapplied to 65 The upper end 6 of this member?) is beveled, ,is promoted by the bolt 8 which fits snugly copper. But if a greater cross-sectional area ofcopper is desired to promote conductivity of the electric current, the diameter of body 2 may be considerably enlarged over the point member 3, see Fig. 6. This is especially desirable where body 2 is required to be extra long. In this larger body the bolt itself may be at one side of the axial center as shown in Fig. 6. In this figure, a small cop per tube 18 is also afiixed to the end of bolt 8 at one of the passages 16, and by this extension into the bore 4 the circulation of water' is 'made more eflicient and positive and insures perfect cooling of the welding end member 3 throughout its length.

What I claim is: 1 A

1. In an electric spot-welding electrode, a tubular body having fluid connections, a separate point member, and a locking bolt for said member engaged lengthwise in susgaiping relation with the inner wall of said 2. In an electric spot-welding electrode, a tubular body having fluid connections, a separate point member, and a locking bolt for said member enga ed lengthwise in sustaining relation with t e inner wall of said body and sub-dividing the interior of said tubular body into circulating passages for the cooling fluid.

3. In an electric spot-welding electrode, a tubular-body having fluid connections, a separate point member, a bolt for said member sub-dividing the interior of said body into separate water-circulating passages, and

of saidbolt withmeans to prevent rotation in said body.

4. In an electric spot-welding electrode, a body having a bore therein and a separate welding end member, means to fasten said member in fixed position comprising a bolt reduced between its ends to tprovide separate passages within the bore 0 said body, and

branch tubes open to the interior of said bore at opposite sides of saidbolt.

5. In an electric. spot-welding electrode, a cylindrical body having a chamber lengthwise thereof and branch tubes open to said chamber, a separate welding member at the end of said body, a fastening'bolt for said member extending .through said chamber and engaged with the wall thereof on two opposite sides and spaced apart therefrom otherwise, and a nut for said bolt.

6. In an electric spot-welding electrode, a hollow .body having a separate welding said -member at itsend, a flat-sided bolt subdividing said hollow body and screw-engaged with said end member, and means to circulate a, cooling fluid through said body on op o'site sides of said bolt.

7. 'n electric spot-Welding electrode having a bore lengthwise thereof and water-circulating branch tubes open to said bore at its upper end, and a solid core member extending through said bore and dividing the same mto separate passages havin open communication with each other at t e bottom Welding end ofsaid electrode.

8. In an electric sp0t welding electrode, a cylindrical body having a bore with a fluid inlet and outlet at its top and provided with a hollow welding end, and a bolt sub-dividing said bore into separate passages and having channels in its lower end opening into said hollow welding end.

9. In an electric spot-weldin electrode, a tubular body having branch tu es, a hollow -welding end member, a bolt havin threaded ends and reduced sides and a apted to snugly fit lengthwise within said tubular body and screw-en age said end member, and a nut and was er for said bolt at the upper end of said body.

10. -An electric spotweldin'g electrode comprising a tube, a separate hollow end member, a bolt extending through said tube and having slidable interlocking engagement with said tube, and means to draw said bolt lengthwise of the tube to fasten said end member in place.

11. An electric spot-weldin electrode comprising a tube, a separate liollow end ioo member, and a locking bolt for said member having threaded ends and reduced in cross section between said ends and having separate passages under the threads at one end. '12. A- sectional welding electrode having a locking bolt cut away in part between its ends to provide separate fluid passages within said electrode.

13. A sectional welding electrode and a stud-bolt therefor. having portions cut away lengthwise on,its outer surface to provide separate fluid passages for said electrode.

14;. weldlng electrode and a stud-bolt providing separate fluid passa es within said electrode between the threa ed ends of said stud-bolt, one of the threaded ends of stud-bolt havin drilled channels lengthwise therethroug l Y 15. A sectional electrode body and a lockin stud-bolt therefor and means to prevent sald stud-bolt body. I a

16. A sectional welding electrode having a locking stud-bolt constructed to provide separate fluid passages between its threaded ends and having drilled channels lengthwise through one end and an extension tube for one of said drilled channels.

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from rotating withm said i 17. A welding electrode comprising a said bore, and means to secure said end 10 tubular body and a removable end member member removably in place. 7 ofdifierent diameters,- said end member be- In testimon whereof I afiix my signature ing eccexatriclallly reliatled and flush at one side in presence 9 two witnesses.

with sai tu u ar 0 y. r

18. A we1dinl electrode comprising a cy- ALBERTIS TAYLOR lindrical bod aving an eccentric ore, a Witnesses: separate wel ing end member of less diame- Grmnms FILLINS, ter than said body seated in alinement with W. D. BYARD. 

